论文标题
在2020年巨大爆发期间，Insight-HXMT观察到的1A 0535+262的较大光度范围内的相位依赖性演变
Phase dependent evolution within large luminosity range of 1A 0535+262 observed by Insight-HXMT during 2020 giant outburst
论文作者
论文摘要
我们已经根据2020年源源爆发期间对Insight-HxMT的观察结果进行了积分PULSAR 1A〜0535+262的相分辨光谱分析。我们专注于爆发时间和不同阶段的回旋共振散射特征（CRSF）的二维依赖性。基本CRSF线（F-CRSF）显示出不同的时间和相位依赖性行为。以较高的发光度，F-CRSF能量的相位曲线从单个峰变为双峰，其过渡发生在MJD 59185。相反，首先在狭窄的相位（0.8 $ -1.0）内检测到的第一个Harmonic CRSF（1-ST CRSF）在$ 100 $ 100的$ \ sim $ 100 kev仅检测到Allow F-Crs Fine。基于这些结果，我们推测，当源进入超临界状态时，较高的积聚柱可以通过较高能量带的“反铅笔”梁在狭窄相处显着增强谐波线。同时，它也会影响基本线的行为。
We have performed phase-resolved spectral analysis of the accreting pulsar 1A~0535+262 based on observations of Insight-HXMT during the 2020 Type-II outburst of the source. We focus on the two-dimensional dependence of the cyclotron resonance scattering features (CRSFs) along the outburst time and at different phases. The fundamental CRSF line (f-CRSF) shows different time- and phase-dependent behaviors. At higher luminosity, the phase profile of the f-CRSF energy changes from a single peak to double peaks, with the transition occurring at MJD 59185. On the contrary, the first harmonic CRSF (1-st CRSF) at $\sim$ 100 keV is only detected within a narrow phase range (0.8$-$1.0) accompanied by a shallow f-CRSF line. Based on these results, we speculate that when the source enters the supercritical regime, the higher accretion column can significantly enhance the harmonic line at a narrow phase through an "anti-pencil" beam at a higher energy band. At the same time, it will also affect the behavior of the fundamental line.
